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Aerohive AP120 Hardware Reference Manual
Also see for BR200-WP: Operating instructions
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Contents
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Chapter A110 AerohivePower over Ethernet Port Pin AssignmentsThe pin assignments in the PoE (Power over Ethernet) Ethernet ports follow the TIA/EIA-568-B standard (seeFigure 2 and Figure 3 on page 111). The ports accept standard types of Ethernet cable—cat3, cat5, cat5e,or cat6—and can receive power from power-sourcing equipment (PSE) that is 802.3af-compatible. If youuse cat5, cat5e, or cat6 cables, Aerohive PoE devices can also support 802.3at-compliant PSE. Suchequipment can be embedded in a switch or router, or it can come from purpose-built devices that injectpower into the Ethernet line en route to the device. Because PoE ports have autosensing capabilities, thewiring termination in the Ethernet cable can be either straight-through or crossover.Figure 2 Pin assignments for an Ethernet PoE portPoE ports are auto-sensing and can automatically adjust to transmit and receive data over straight-throughor crossover Ethernet connections. Likewise, they can automatically adjust to 802.3af Alternative A and Bpower delivery methods. Furthermore, when the Alternative A method is used, the ports automatically allowfor polarity reversals depending on their role as either MDI or MDI-X. In 802.3at, the 1/2 and 3/6 wire pairsconnect to DC source 1 and 4/5 and 7/8 pairs to DC source 2 in PSE. Although the exact polarity dependson the PSE design, the Ethernet ports can support all possible options.Table 1 Wiring Usage for an Ethernet PoE port802.3af Alternative A (data andpower on the same wires)802.3af Alternative B (data andpower on separate wires) 802.3af wiring optionsPin Data Signal MDI ** MDI = Medium-dependent interface for straight-through connectionsMDI-X MDI or MDI-X 1 2 3 41 Transmit + DC+ DC- - - - DC1+ DC1- DC1+ DC1-2 Transmit - DC+ DC- - - - DC1+ DC1- DC1+ DC1-3 Receive + DC- DC+ - - - DC1- DC1+ DC1- DC1+4 (unused) - - - - - - DC+ DC2+ DC2+ DC2- DC2-5 (unused) - - - - - - DC+ DC2+ DC2+ DC2- DC2-6 Receive - DC- DC+ - - - DC1- DC1+ DC1- DC1+7 (unused) - - - - - - DC- DC2- DC2- DC2+ DC2+8 (unused) - - - - - - DC- DC2- DC2- DC2+ DC2+ETH0(View of the ETH0 PoEPort on the AP340)8 1Pin numbers |
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